I have discovered a fuel leak at the rear of the car on the passenger side. Fuel is running off of the vehicle frame and down on to the muffler but only when the car is running. After shutting the car off it stops shortly afterward. I suspect a rubber fuel line is leaking but can't see up in there very well without a lift. The car is a '75 coupe. Anyone had this problem before?

It will be either the connection where the rubber line from the tank connects to the steel line on the car, or just a hole/crack in the rubber line itself. Could be either the main feed line OR the return line, but return line sounds more plausible, since it only leaks while running.

Gotta get up in there and have a look-see. Easy enough to change the rubber lines, so I would suggest doing that, anyway. Be sure the metal lines don't have a rusted out spot in them somewhere in the area, too, but my guess is one of the rubber lines has failed.

Thanks again Joel. I just ordered all new rubber lines. The two at the tank and the two up at the pump. Figured I may as well replace them all as they're over 38 years old. Not very expensive insurance I figure.

Installed the new fuel lines today and everything is good now. Dropped the tank down to check the sending unit gasket and overall condition of the tank. Tank was still like brand new after 38 years. The spare tire is the original Firestone 500 white wall and it still held air!

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